Improved limekiln



GRISCOIV! .& MILLER.

l Lime Kiln. No. 54.717. Patented May 15, 1866.

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POWELL GRISOOM AND J. H. MILLER, OF BALTIMORE, MARYLAND.

IMPROVED LIlVlEKILN.

Specification forming part of Letters Patent No. 54,7] 7, dated May 15, 1866.

To all rwhom it may concern:

Beit known that we, POWELL GEIsooM and J Aimes H. MILLER, of the city and county of Baltimore, and State of Maryland, have made new and useful Improvements in Limekilns; and we do hereby declare the following to be a full, clear, and exact description of the nature, construction, and operation of the same sufficient to enable one skilled in the art to which it appcrtains to construct and use the same, reference bein g had to the accompanying drawings, which are made a part of this specilication, in which- Figure l is a horizontal section on the line a: Figs. 2 and 3. Fig. 2 is a vertical section on the liney y, Fig. l. Fig. 3 is a vertical section on the line z z, Fig. 1.

The improvement consists in the arrangement of the furnaces upon one side ofthe kiln and the draw-pits upon the otherside, the furnaces communicating by side openings with the interior of the kiln and the draw-pits with the lower end, and forming a continuouslyacting kiln.

In the Patent of Griscom and Dana, No. 18,635, and dated November 17,1857, it will be seen that the furnaces are arranged two to each kiln, communicating through openings in the sides of the respective openings, and the openings to the furnaces being situated above the draw-pit openings; but in the improvements detailed in this specification the furnace located between the kilns is made somewhat larger, and is made to communicate with the kiln on each side of it, while the draw-pit and furnace-openings are on opposite sides, much facilitating the operation, economizing material in the structure and in the expenditure of fuel, while the draw-pit on the'down-hill side of the kiln is relieved of the staging above, which was necessary for the firemen.

It is found that by this arrangement more lime can be made witha given amount of fuel, thelabor of a fireman is saved in a twokiln arrangement, the various openings are more accessible, the workmen are less cramped in their operations and have a better circulation of air around them, and when it is desired to add to the number of kilns it only requires an additional iire to each, while, in the former arrangement cited two furnaces were required to each kiln, irrespective of the number of the latter.

In the drawings, A are the openings to be filled with limestone, and B are the draw-pits, communicating with the lower end for the withdrawal of the lime.

O are the furnaces, having grate-bars F, and communicating by side openings, G, with the interior spaces, A. E are the ash-pits.

Having described our invention, what we claim therein as new, and desire to secure by Letters Patent, is-

1. The arrangement ofthe draw-pits and furnaces on opposite sides, as described.

2. The arrangement of the furnaces in respect of the kilns, so that the furnaces, with the exception of those at the ends, shall communicate with the kiln at each side.

To the above specification pf our improvement in limekilns we have signed our hands this 6th day of March,1866.

POWELL GRISOOM. l JAMES H. MILLER.

Witnesses:

EDWARD H. KNIGHT, JOHN A. WEIDEESHEIM. 

